A. I love to swim. Swimming has a definite rhythm, and writing should have, too. If you are using the rhythm in one aspect of your life, it makes it easier to feel it in other aspects of your life. If I hadn't swum, I probably wouldn't have written some of the things I've written.
Madeleine L'Engle, in The Wand in the Word: Conversations with Writers of Fantasy, compiled and edited by Leonard S. Marcus, Candlewick Press, 2009